![Jean Delvare](/assets/img/avatar_default.png)
From: Jean Delvare <khali@linux-fr.org> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Adrian Bunk <bunk@kernel.org>
588 lines
15 KiB
C
588 lines
15 KiB
C
/*
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* Driver for DEC VSXXX-AA mouse (hockey-puck mouse, ball or two rollers)
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* DEC VSXXX-GA mouse (rectangular mouse, with ball)
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* DEC VSXXX-AB tablet (digitizer with hair cross or stylus)
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*
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* Copyright (C) 2003-2004 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
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*
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* The packet format was initially taken from a patch to GPM which is (C) 2001
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* by Karsten Merker <merker@linuxtag.org>
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* and Maciej W. Rozycki <macro@ds2.pg.gda.pl>
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* Later on, I had access to the device's documentation (referenced below).
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* Building an adaptor to DE9 / DB25 RS232
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* DISCLAIMER: Use this description AT YOUR OWN RISK! I'll not pay for
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* anything if you break your mouse, your computer or whatever!
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*
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* In theory, this mouse is a simple RS232 device. In practice, it has got
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* a quite uncommon plug and the requirement to additionally get a power
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* supply at +5V and -12V.
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*
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* If you look at the socket/jack (_not_ at the plug), we use this pin
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* numbering:
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* _______
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* / 7 6 5 \
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* | 4 --- 3 |
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* \ 2 1 /
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* -------
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*
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* DEC socket DE9 DB25 Note
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* 1 (GND) 5 7 -
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* 2 (RxD) 2 3 -
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* 3 (TxD) 3 2 -
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* 4 (-12V) - - Somewhere from the PSU. At ATX, it's
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* the thin blue wire at pin 12 of the
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* ATX power connector. Only required for
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* VSXXX-AA/-GA mice.
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* 5 (+5V) - - PSU (red wires of ATX power connector
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* on pin 4, 6, 19 or 20) or HDD power
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* connector (also red wire).
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* 6 (+12V) - - HDD power connector, yellow wire. Only
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* required for VSXXX-AB digitizer.
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* 7 (dev. avail.) - - The mouse shorts this one to pin 1.
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* This way, the host computer can detect
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* the mouse. To use it with the adaptor,
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* simply don't connect this pin.
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*
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* So to get a working adaptor, you need to connect the mouse with three
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* wires to a RS232 port and two or three additional wires for +5V, +12V and
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* -12V to the PSU.
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*
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* Flow specification for the link is 4800, 8o1.
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*
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* The mice and tablet are described in "VCB02 Video Subsystem - Technical
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* Manual", DEC EK-104AA-TM-001. You'll find it at MANX, a search engine
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* specific for DEC documentation. Try
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* http://www.vt100.net/manx/details?pn=EK-104AA-TM-001;id=21;cp=1
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/serio.h>
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#include <linux/init.h>
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#define DRIVER_DESC "Driver for DEC VSXXX-AA and -GA mice and VSXXX-AB tablet"
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MODULE_AUTHOR ("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
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MODULE_DESCRIPTION (DRIVER_DESC);
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MODULE_LICENSE ("GPL");
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#undef VSXXXAA_DEBUG
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#ifdef VSXXXAA_DEBUG
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#define DBG(x...) printk (x)
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#else
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#define DBG(x...) do {} while (0)
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#endif
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#define VSXXXAA_INTRO_MASK 0x80
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#define VSXXXAA_INTRO_HEAD 0x80
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#define IS_HDR_BYTE(x) (((x) & VSXXXAA_INTRO_MASK) \
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== VSXXXAA_INTRO_HEAD)
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#define VSXXXAA_PACKET_MASK 0xe0
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#define VSXXXAA_PACKET_REL 0x80
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#define VSXXXAA_PACKET_ABS 0xc0
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#define VSXXXAA_PACKET_POR 0xa0
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#define MATCH_PACKET_TYPE(data, type) (((data) & VSXXXAA_PACKET_MASK) == (type))
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struct vsxxxaa {
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struct input_dev *dev;
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struct serio *serio;
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#define BUFLEN 15 /* At least 5 is needed for a full tablet packet */
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unsigned char buf[BUFLEN];
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unsigned char count;
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unsigned char version;
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unsigned char country;
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unsigned char type;
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char name[64];
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char phys[32];
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};
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static void
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vsxxxaa_drop_bytes (struct vsxxxaa *mouse, int num)
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{
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if (num >= mouse->count)
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mouse->count = 0;
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else {
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memmove (mouse->buf, mouse->buf + num - 1, BUFLEN - num);
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mouse->count -= num;
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}
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}
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static void
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vsxxxaa_queue_byte (struct vsxxxaa *mouse, unsigned char byte)
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{
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if (mouse->count == BUFLEN) {
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printk (KERN_ERR "%s on %s: Dropping a byte of full buffer.\n",
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mouse->name, mouse->phys);
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vsxxxaa_drop_bytes (mouse, 1);
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}
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DBG (KERN_INFO "Queueing byte 0x%02x\n", byte);
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mouse->buf[mouse->count++] = byte;
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}
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static void
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vsxxxaa_detection_done (struct vsxxxaa *mouse)
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{
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switch (mouse->type) {
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case 0x02:
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strlcpy (mouse->name, "DEC VSXXX-AA/-GA mouse",
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sizeof (mouse->name));
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break;
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case 0x04:
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strlcpy (mouse->name, "DEC VSXXX-AB digitizer",
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sizeof (mouse->name));
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break;
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default:
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snprintf (mouse->name, sizeof (mouse->name),
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"unknown DEC pointer device (type = 0x%02x)",
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mouse->type);
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break;
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}
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printk (KERN_INFO
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"Found %s version 0x%02x from country 0x%02x on port %s\n",
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mouse->name, mouse->version, mouse->country, mouse->phys);
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}
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/*
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* Returns number of bytes to be dropped, 0 if packet is okay.
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*/
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static int
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vsxxxaa_check_packet (struct vsxxxaa *mouse, int packet_len)
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{
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int i;
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/* First byte must be a header byte */
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if (!IS_HDR_BYTE (mouse->buf[0])) {
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DBG ("vsck: len=%d, 1st=0x%02x\n", packet_len, mouse->buf[0]);
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return 1;
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}
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/* Check all following bytes */
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if (packet_len > 1) {
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for (i = 1; i < packet_len; i++) {
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if (IS_HDR_BYTE (mouse->buf[i])) {
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printk (KERN_ERR "Need to drop %d bytes "
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"of a broken packet.\n",
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i - 1);
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DBG (KERN_INFO "check: len=%d, b[%d]=0x%02x\n",
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packet_len, i, mouse->buf[i]);
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return i - 1;
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}
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}
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}
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return 0;
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}
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static __inline__ int
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vsxxxaa_smells_like_packet (struct vsxxxaa *mouse, unsigned char type, size_t len)
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{
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return (mouse->count >= len) && MATCH_PACKET_TYPE (mouse->buf[0], type);
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}
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static void
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vsxxxaa_handle_REL_packet (struct vsxxxaa *mouse)
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{
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struct input_dev *dev = mouse->dev;
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unsigned char *buf = mouse->buf;
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int left, middle, right;
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int dx, dy;
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/*
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* Check for normal stream packets. This is three bytes,
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* with the first byte's 3 MSB set to 100.
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*
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* [0]: 1 0 0 SignX SignY Left Middle Right
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* [1]: 0 dx dx dx dx dx dx dx
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* [2]: 0 dy dy dy dy dy dy dy
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*/
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/*
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* Low 7 bit of byte 1 are abs(dx), bit 7 is
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* 0, bit 4 of byte 0 is direction.
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*/
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dx = buf[1] & 0x7f;
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dx *= ((buf[0] >> 4) & 0x01)? 1: -1;
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/*
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* Low 7 bit of byte 2 are abs(dy), bit 7 is
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* 0, bit 3 of byte 0 is direction.
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*/
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dy = buf[2] & 0x7f;
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dy *= ((buf[0] >> 3) & 0x01)? -1: 1;
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/*
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* Get button state. It's the low three bits
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* (for three buttons) of byte 0.
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*/
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left = (buf[0] & 0x04)? 1: 0;
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middle = (buf[0] & 0x02)? 1: 0;
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right = (buf[0] & 0x01)? 1: 0;
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vsxxxaa_drop_bytes (mouse, 3);
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DBG (KERN_INFO "%s on %s: dx=%d, dy=%d, buttons=%s%s%s\n",
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mouse->name, mouse->phys, dx, dy,
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left? "L": "l", middle? "M": "m", right? "R": "r");
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/*
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* Report what we've found so far...
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*/
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input_report_key (dev, BTN_LEFT, left);
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input_report_key (dev, BTN_MIDDLE, middle);
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input_report_key (dev, BTN_RIGHT, right);
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input_report_key (dev, BTN_TOUCH, 0);
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input_report_rel (dev, REL_X, dx);
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input_report_rel (dev, REL_Y, dy);
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input_sync (dev);
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}
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static void
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vsxxxaa_handle_ABS_packet (struct vsxxxaa *mouse)
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{
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struct input_dev *dev = mouse->dev;
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unsigned char *buf = mouse->buf;
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int left, middle, right, touch;
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int x, y;
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/*
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* Tablet position / button packet
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*
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* [0]: 1 1 0 B4 B3 B2 B1 Pr
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* [1]: 0 0 X5 X4 X3 X2 X1 X0
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* [2]: 0 0 X11 X10 X9 X8 X7 X6
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* [3]: 0 0 Y5 Y4 Y3 Y2 Y1 Y0
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* [4]: 0 0 Y11 Y10 Y9 Y8 Y7 Y6
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*/
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/*
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* Get X/Y position. Y axis needs to be inverted since VSXXX-AB
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* counts down->top while monitor counts top->bottom.
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*/
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x = ((buf[2] & 0x3f) << 6) | (buf[1] & 0x3f);
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y = ((buf[4] & 0x3f) << 6) | (buf[3] & 0x3f);
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y = 1023 - y;
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/*
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* Get button state. It's bits <4..1> of byte 0.
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*/
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left = (buf[0] & 0x02)? 1: 0;
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middle = (buf[0] & 0x04)? 1: 0;
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right = (buf[0] & 0x08)? 1: 0;
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touch = (buf[0] & 0x10)? 1: 0;
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vsxxxaa_drop_bytes (mouse, 5);
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DBG (KERN_INFO "%s on %s: x=%d, y=%d, buttons=%s%s%s%s\n",
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mouse->name, mouse->phys, x, y,
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left? "L": "l", middle? "M": "m",
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right? "R": "r", touch? "T": "t");
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/*
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* Report what we've found so far...
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*/
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input_report_key (dev, BTN_LEFT, left);
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input_report_key (dev, BTN_MIDDLE, middle);
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input_report_key (dev, BTN_RIGHT, right);
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input_report_key (dev, BTN_TOUCH, touch);
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input_report_abs (dev, ABS_X, x);
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input_report_abs (dev, ABS_Y, y);
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input_sync (dev);
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}
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static void
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vsxxxaa_handle_POR_packet (struct vsxxxaa *mouse)
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{
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struct input_dev *dev = mouse->dev;
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unsigned char *buf = mouse->buf;
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int left, middle, right;
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unsigned char error;
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/*
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* Check for Power-On-Reset packets. These are sent out
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* after plugging the mouse in, or when explicitly
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* requested by sending 'T'.
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*
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* [0]: 1 0 1 0 R3 R2 R1 R0
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* [1]: 0 M2 M1 M0 D3 D2 D1 D0
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* [2]: 0 E6 E5 E4 E3 E2 E1 E0
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* [3]: 0 0 0 0 0 Left Middle Right
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*
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* M: manufacturer location code
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* R: revision code
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* E: Error code. If it's in the range of 0x00..0x1f, only some
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* minor problem occured. Errors >= 0x20 are considered bad
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* and the device may not work properly...
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* D: <0010> == mouse, <0100> == tablet
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*/
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mouse->version = buf[0] & 0x0f;
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mouse->country = (buf[1] >> 4) & 0x07;
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mouse->type = buf[1] & 0x0f;
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error = buf[2] & 0x7f;
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/*
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* Get button state. It's the low three bits
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* (for three buttons) of byte 0. Maybe even the bit <3>
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* has some meaning if a tablet is attached.
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*/
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left = (buf[0] & 0x04)? 1: 0;
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middle = (buf[0] & 0x02)? 1: 0;
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right = (buf[0] & 0x01)? 1: 0;
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vsxxxaa_drop_bytes (mouse, 4);
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vsxxxaa_detection_done (mouse);
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if (error <= 0x1f) {
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/* No (serious) error. Report buttons */
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input_report_key (dev, BTN_LEFT, left);
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input_report_key (dev, BTN_MIDDLE, middle);
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input_report_key (dev, BTN_RIGHT, right);
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input_report_key (dev, BTN_TOUCH, 0);
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input_sync (dev);
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if (error != 0)
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printk (KERN_INFO "Your %s on %s reports error=0x%02x\n",
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mouse->name, mouse->phys, error);
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}
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/*
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* If the mouse was hot-plugged, we need to force differential mode
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* now... However, give it a second to recover from it's reset.
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*/
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printk (KERN_NOTICE "%s on %s: Forceing standard packet format, "
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"incremental streaming mode and 72 samples/sec\n",
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mouse->name, mouse->phys);
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mouse->serio->write (mouse->serio, 'S'); /* Standard format */
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mdelay (50);
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mouse->serio->write (mouse->serio, 'R'); /* Incremental */
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mdelay (50);
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mouse->serio->write (mouse->serio, 'L'); /* 72 samples/sec */
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}
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static void
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vsxxxaa_parse_buffer (struct vsxxxaa *mouse)
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{
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unsigned char *buf = mouse->buf;
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int stray_bytes;
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/*
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* Parse buffer to death...
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*/
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do {
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/*
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* Out of sync? Throw away what we don't understand. Each
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* packet starts with a byte whose bit 7 is set. Unhandled
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* packets (ie. which we don't know about or simply b0rk3d
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* data...) will get shifted out of the buffer after some
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* activity on the mouse.
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*/
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while (mouse->count > 0 && !IS_HDR_BYTE(buf[0])) {
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printk (KERN_ERR "%s on %s: Dropping a byte to regain "
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"sync with mouse data stream...\n",
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mouse->name, mouse->phys);
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vsxxxaa_drop_bytes (mouse, 1);
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}
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/*
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* Check for packets we know about.
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*/
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if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_REL, 3)) {
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/* Check for broken packet */
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stray_bytes = vsxxxaa_check_packet (mouse, 3);
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if (stray_bytes > 0) {
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printk (KERN_ERR "Dropping %d bytes now...\n",
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stray_bytes);
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vsxxxaa_drop_bytes (mouse, stray_bytes);
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continue;
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}
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vsxxxaa_handle_REL_packet (mouse);
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continue; /* More to parse? */
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}
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if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_ABS, 5)) {
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/* Check for broken packet */
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stray_bytes = vsxxxaa_check_packet (mouse, 5);
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if (stray_bytes > 0) {
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printk (KERN_ERR "Dropping %d bytes now...\n",
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stray_bytes);
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vsxxxaa_drop_bytes (mouse, stray_bytes);
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continue;
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}
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vsxxxaa_handle_ABS_packet (mouse);
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continue; /* More to parse? */
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}
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if (vsxxxaa_smells_like_packet (mouse, VSXXXAA_PACKET_POR, 4)) {
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/* Check for broken packet */
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stray_bytes = vsxxxaa_check_packet (mouse, 4);
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if (stray_bytes > 0) {
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printk (KERN_ERR "Dropping %d bytes now...\n",
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stray_bytes);
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vsxxxaa_drop_bytes (mouse, stray_bytes);
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continue;
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}
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vsxxxaa_handle_POR_packet (mouse);
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continue; /* More to parse? */
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}
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break; /* No REL, ABS or POR packet found */
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} while (1);
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}
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static irqreturn_t
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vsxxxaa_interrupt (struct serio *serio, unsigned char data, unsigned int flags)
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{
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struct vsxxxaa *mouse = serio_get_drvdata (serio);
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vsxxxaa_queue_byte (mouse, data);
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vsxxxaa_parse_buffer (mouse);
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return IRQ_HANDLED;
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}
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static void
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vsxxxaa_disconnect (struct serio *serio)
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{
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struct vsxxxaa *mouse = serio_get_drvdata (serio);
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serio_close (serio);
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serio_set_drvdata (serio, NULL);
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input_unregister_device (mouse->dev);
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kfree (mouse);
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}
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static int
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vsxxxaa_connect (struct serio *serio, struct serio_driver *drv)
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{
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struct vsxxxaa *mouse;
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struct input_dev *input_dev;
|
|
int err = -ENOMEM;
|
|
|
|
mouse = kzalloc (sizeof (struct vsxxxaa), GFP_KERNEL);
|
|
input_dev = input_allocate_device ();
|
|
if (!mouse || !input_dev)
|
|
goto fail1;
|
|
|
|
mouse->dev = input_dev;
|
|
mouse->serio = serio;
|
|
strlcat (mouse->name, "DEC VSXXX-AA/-GA mouse or VSXXX-AB digitizer",
|
|
sizeof (mouse->name));
|
|
snprintf (mouse->phys, sizeof (mouse->phys), "%s/input0", serio->phys);
|
|
|
|
input_dev->name = mouse->name;
|
|
input_dev->phys = mouse->phys;
|
|
input_dev->id.bustype = BUS_RS232;
|
|
input_dev->dev.parent = &serio->dev;
|
|
|
|
set_bit (EV_KEY, input_dev->evbit); /* We have buttons */
|
|
set_bit (EV_REL, input_dev->evbit);
|
|
set_bit (EV_ABS, input_dev->evbit);
|
|
set_bit (BTN_LEFT, input_dev->keybit); /* We have 3 buttons */
|
|
set_bit (BTN_MIDDLE, input_dev->keybit);
|
|
set_bit (BTN_RIGHT, input_dev->keybit);
|
|
set_bit (BTN_TOUCH, input_dev->keybit); /* ...and Tablet */
|
|
set_bit (REL_X, input_dev->relbit);
|
|
set_bit (REL_Y, input_dev->relbit);
|
|
input_set_abs_params (input_dev, ABS_X, 0, 1023, 0, 0);
|
|
input_set_abs_params (input_dev, ABS_Y, 0, 1023, 0, 0);
|
|
|
|
serio_set_drvdata (serio, mouse);
|
|
|
|
err = serio_open (serio, drv);
|
|
if (err)
|
|
goto fail2;
|
|
|
|
/*
|
|
* Request selftest. Standard packet format and differential
|
|
* mode will be requested after the device ID'ed successfully.
|
|
*/
|
|
serio->write (serio, 'T'); /* Test */
|
|
|
|
err = input_register_device (input_dev);
|
|
if (err)
|
|
goto fail3;
|
|
|
|
return 0;
|
|
|
|
fail3: serio_close (serio);
|
|
fail2: serio_set_drvdata (serio, NULL);
|
|
fail1: input_free_device (input_dev);
|
|
kfree (mouse);
|
|
return err;
|
|
}
|
|
|
|
static struct serio_device_id vsxxaa_serio_ids[] = {
|
|
{
|
|
.type = SERIO_RS232,
|
|
.proto = SERIO_VSXXXAA,
|
|
.id = SERIO_ANY,
|
|
.extra = SERIO_ANY,
|
|
},
|
|
{ 0 }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(serio, vsxxaa_serio_ids);
|
|
|
|
static struct serio_driver vsxxxaa_drv = {
|
|
.driver = {
|
|
.name = "vsxxxaa",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.id_table = vsxxaa_serio_ids,
|
|
.connect = vsxxxaa_connect,
|
|
.interrupt = vsxxxaa_interrupt,
|
|
.disconnect = vsxxxaa_disconnect,
|
|
};
|
|
|
|
static int __init
|
|
vsxxxaa_init (void)
|
|
{
|
|
return serio_register_driver(&vsxxxaa_drv);
|
|
}
|
|
|
|
static void __exit
|
|
vsxxxaa_exit (void)
|
|
{
|
|
serio_unregister_driver(&vsxxxaa_drv);
|
|
}
|
|
|
|
module_init (vsxxxaa_init);
|
|
module_exit (vsxxxaa_exit);
|
|
|